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NULL, unique pointers from malloc(0), and freed pointers are legal values for

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noalias attribute parameters/return values.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59955 91177308-0d34-0410-b5e6-96231b3b80d8
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Torok Edwin 2008-11-24 08:02:24 +00:00
parent 027fdbe3ba
commit 9682607ad6
1 changed files with 3 additions and 1 deletions
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@ -894,7 +894,9 @@ declare signext i8 @returns_signed_char()
parameter. The caller is responsible for ensuring that this is the
case. On a function return value, <tt>noalias</tt> additionally indicates
that the pointer does not alias any other pointers visible to the
caller.</dd>
caller. Note that this applies only to pointers that can be used to actually
load/store a value: NULL, unique pointers from malloc(0), and freed pointers
are considered to not alias anything.</dd>
<dt><tt>nest</tt></dt>
<dd>This indicates that the pointer parameter can be excised using the